Heating-furnace.



APPLICATION FILED MAY 29, 1905.

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PATENTED MAY 29, 1906.

J. F. 6: P. O. ADAMS.

HEATING FURNACE.

APPLIOATION FILED MAY 29, 1905.

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JULIUS F. ADAMS AND FRIEDERIGH O. ADAMS, OF ALLEGHENY, PENNSYLVANIA.

HEATING" FURNACE.

Specification of Letters Patent.

Patented May 29, 1906.

Application filed May 29, 1905. Serial No. 262,733.

To (Ll/Z LI/7min it new concern.-

I Be it known that we, JULIUS F. ADAMS and FRIEDERICH O. ADAMs, citizens of the This invention relates-to hot-air gas-burn.

ing furnaces, and the general purpose thereof is to render more efficient this type of furnace by providing improved means for circulating therethrough the air to be heated.

A further purpose is to so construct the furnace that the greatest possible amount of heat is extracted or absorbed from the fumes or products before they are finally discharged through the chimney connection.

In the accompanying drawings, Figure 1 is a vertical sectional view of a furnace constructed in accordance with the invention. Fig. 2 is a sectional plan view taken on line 2 2 of Fig. 1. Fig. 3 is a similar view of the fume-drum taken on line 3 3 of the same figure. Fig. 4 is a cross-sectional view, enlarged, of the combustion chamber and burner and a portion of one ofthe air-circulat ing pipes.

Referring to the drawings, 2 designates the usual outer inclosing casing or jacket having cold-air inlets 3 at its lower end and conductor-pipe connections 4 at its upper end. Within this casing is a combustion-chamber 5, which is preferably in the form of a hollow square, and within each side thereof is a tubular burner-section 6, formed with vertical air-passages 7. Rising from this combustion-chamber are fume-tubes 8, which support and open into the fume-drum 9.

Tubes 8 and burner-passages 7 are in line with each other and with openings 5, and extending upward through each of these passages is an air-circulating pipe 10, which is continued through the drum and opens through the upper end thereof, the passage through the end surface being cemented at 1 1 to prevent the escape of fumes into the airspace. While these pipes may be supported in any suitable manner, we prefer to provide the upper end of each with a nut 12, which constitutes a head with the pipes depending loosely through thefume-tubes and combustion-chamber and open at their lower ends, which project slightly below the bottom-of the latter.

It isdesirable to so construct the heatthe fumes, and this we accomplish by dividing the same into a succession of communicating compartments formed by the horizontal partitions 13, each of which. has an-open- 1 ing 14, through whichv adjacent compartments communicate. .These openings are preferably arranged out of line with each other, so as to prevent what would otherwise be a direct upward passage of the-fumes through the drum. With the vertically open or hollow drum thus horizontally partitioned the fumes are required to circulate therethrough and therearound anumber of times When constructing the furnace, pipes 10 are caused to fit tightly the openings in partithey pass, and while such frictional engagement might be sufficient to sustain the pipes, nuts or heads 12 are desirable, as they not only make the pipes absolutely secure, but also bear downward on and make more efficient the seals 11.

Fumetubes 8 are preferably upwardly tapered, but the size thereof and of pipes 10 is such that the upper ends of the tubes are not wholly closed, there being sufiicient space for the passage of the fumes into the drum. The ignited gases and products are thereby retarded in their upward course and heat to a high degree tubes 8 and pipes 10, and hence the air flowing upward through the latter is similarly heated. At the same time tubesS give off or radiate a large amount of heat to the surrounding air within jacket 2. Thus the heat is availed of to the greatest possible extent before the products enter the drum, and owing to their circuitous course through and their contact with pipes 10 therein practically all of the heat is absorbed by the time. flue connection 15 is reached.

Each of the burner-sections has a gas and air inlet pipe or mixer 16, and the pipes are preferably so arranged that two of them receive gas from a gas-supply 17, while the other two are similarly supplied from a separate source 17. With this arrangement either two or four of the burners may be drum as to provide a circuitous passage for.

tions 13 and the drum-top through which before finally reaching the fume-exit -15.

used, as the demands upon the furnace may re uire. The furnace may be conveniently lighted by means of a constantly-burning pilot 18 of usual design.

We claim 1. The combination of a combustion-chamber, a fume-drum above the combustionchamber, fume-tubes connecting said chamber and drum, and air pipes extending through the tubes and drum.

2. The combination of a vertically-open combustion-chamb er, a vertically-op en fumedrum above the combustion-chamber, fumetubes connecting the chamber and drum, the vertical openings in the chamber and drum affording free circulation of air, and air-pipes extending through both the chamber and drum. I

3. The combination of a combustion-chamber, flue-tubes rising therefrom, a gas-burner within the combustion-chamber having ver tical passages in line with the flue-tubes, and

air-circulating pipes extending through the combustion chamber the burnerpassages and said tubes.

4. The combination of a combustion-chamber, fume-tubes rising therefrom, a fumedrurn into the bottom of which said tubes open, and air-circulating pipes extending through the combustion-chamber and through said tubes and drum.

5. The combination of a combustion-chamber, upwardly-tapering tubes rising therefrom, a fume-drum into thelower end of which the tubes open, and air-circulating pipes extending through the fume-tubes and drum, said pipes being of such size as not to wholly close the fume tubes.

6. The combination of a combustion-chamber, fume-tubes rising therefrom, a fumedrum into the lower end of which the tubes open, a gas-burner within the combustionchamber and formed with vertical passages in line with the fume-tubes, and air-circulating pipes extending through the combustionchamber and the burner and through the fume-tubes and drum.

7. The combination of a combustion-chamber, a fume-drum above the chamber and open from top to bottom for the circulation of air, fume-tubes rising from and connect ing the combustion-chamber with the drum, and air-circulating pipes extending through the tubes and through the inclosed portions of the drum.

8. The combination of a combustion-chamber in form of a hollow square, a gas-burner section in each side thereof, fume-tubes rising from each side of the chamber, a fumedrum into the lower end of which the tubes open, and air-circulating pipes extending through the tubes and through the drum.

In testimony whereof we affix our signatures in presence of two witnesses.

JULIUS F.'ADAMS. FRIEDERICH O, ADAMS.

Witnesses OSCAR DREOHSLER, ANNA ADAMS. 

